In one year eleven class, I was trying to explain trench warfare. They did not respond. So I got them to re-arrange the desks into trenches. Then I got out my Lee Enfield .303 and blew the heads off anyone who stuck their heads above the parapet. It was such a valuable learning experience that I feel a career as a management consultant beckons. Unfortunately I’m now awaiting trial. I intend to plead insanity.